Malicious PDF — malware analysis report

Static analysis result for SHA-256 a696218d7fb7d8e4…

MALICIOUS

PDF

46.4 KB Created: 2021-05-19 05:31:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: cb8146bcfe723a1b4986c3fdb3a09948 SHA-1: 34c1954e62c6ba1caff9c2fee2515f6739b4272d SHA-256: a696218d7fb7d8e432429448e2c8415bfe5633b731718bdf64359eb2c5f2956f
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting game hacks and free spins for Coin Master. The document body, though partially corrupted, contains similar URLs and text suggesting a lure for potentially malicious content or phishing. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/how-to-get-free-spins-in-coin-master-game-hack In PDF document text
    • https://allpromise.com.tw/image/data/files/download-coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/roblox40com-robux_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/minecraft-pe_GM479516143.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000486f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x486F 25152 bytes
SHA-256: 3fdae69bbfc834c37e4fc6ab55f478eaf009cc689027c525a6f39278349078dc
font_01_sfnt_off000081aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81AA 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_02_sfnt_off000093c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93C3 18052 bytes
SHA-256: 52b27d49d658c5dd219fe1685a79a71966a386845fdc62a41335e5719e4d5001

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